头灯放大镜在老年人上颌第一磨牙近颊第二根管治疗中的应用

目的：探讨提高老年人上颌第一磨牙近颊第二根管（MB2）发现率的临床方法.方法：按入选条件随机选取65岁以上老年人需要根管治疗的上颌第一磨牙80颗,分为两组：试验组45颗,用头灯放大镜寻找MB2并记录其发现率和根管找寻时间；对照组35颗,在常规光源下寻找MB2并记录发生率和根管找寻时间,与试验组进行比较.结果：试验组MB2发现率为86.67％、总根管找寻时间为20.13±0.42（分钟）；对照组MB2发现率40％、总根管找寻时间31.21±0.72（min）,两组间MB2发现率及总根管找寻时间存在显著性差异（P＜0.05）.结论：寻找老年人上颌第一磨牙MB2时,头灯放大镜明显优于常规光源,经济实惠、适合临床推广.

Application of Headlight loupe used for the therapy of the second mesiobuccal canals in the first maxillary molars in Geriatric dentistry

Objective： To find the method for increasing the detection rate of 2nd mesiobuccal canal （MB2） and detection rate with Headlight loupe in elderly patients. Method： 80 maxillary first molars were divided into 2 groups.： Headlight loupe in Group A （n=45） and white Light in group B （n=35） were used to look for MB2, then the detection rate of MB2 and time of finding out root canal orifice （TtRCO） were calculated and compared to each other. Result： Detection rate with Headlight loupe was 86.67 % while with White light was 40%. TfRCO with Headlight loupe was 20.13±0.42（min）; TfRCO with White light was 31.21±0.72（min）. Statistically significant discrepancy was found between the detection rate and TfR- CO （P 〈 0.05）. Conclusion： Detection rate of MB2 and TfRCO could be greatly improved by using Headlight loupe.